caldwell



` Patented Aug. 3,1880.

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WILLIAM H. CALDWELL, OF NEW YORK, N. Y.

ILLUMINATED PRINTING.

SPECIFICATION forming part of Letters Patent No. 230,741, dated August 3, 1880. Application filed June 30, 1880. (Model.)

To all whom it may concern:

Be it known that I, WILLIAM H. CALDWELL, of New York, in the county and State of New York, haveinvented anew and useful Improvenient in Illuminated Printing, of which the following is a specification. l

Figure 1 represents a face view of a card printed according to my invention, showingin dotted lines the complete letters as they appear if the card is held up to the light. Fig. 2 is a face View of the card, and Fig. 3 a back view thereof'.

This invention relates to a new manner of producing shaded lettering-that is to say, lettering that has two ditferent eiects upon the eye as to color or depth of color. Such lettering has usually heretofore been produced by composing each letter of two or more tints or of two or more shades of the same tint, so that one part of the letter would appear light and the other part dark or otherwise shaded.

Myinvention is to be limited to the application of lettering or designs to substances that are transparent or translucent, such as paper, glass, or the like; audit consists in makingpart ot' the letter or design on one side and the remaining part of the letter or design on the other side of the substance that bears the lettering, so that when the said substance is held up to the .light the complete letter or design will appear in two diii'erent shades.

One advantage of my invention is that I can thus, on a sheet of paper or pane of glass, produce shaded lettering or design with one single tint only, so that, for example, common printer-s ink can be used by alternate application upon opposite sides of a sheet of paper to produce lettering which to the eye appears clearly to be made of two different shades.

In the drawings, the letterA represents the face, and the letter B the back, of a card of paper or other translucent or transparent material'. On .the face A are printed or painted or otherwise' applied parts of the letters that compose the matter to be printed. On the back B are printed or applied the remaining parts of said letters, in such positions with reference to those parts that are. on the face that when the card is held up to the light the parts of letters on the back B will be in proper relation to the other parts of said letters on the face A, so as to make orproduce the required reading matter, letter, or design. Thus in Fig. 1 is indicated, in dotted lines, all that portion ofthe lettering which is contained on the back B, as it will appear with reference to what is on the face A, Fig. 2, when said card is held up to the light.

I do not, ofcourse, confine myself to any particular kind or style of lettering, nor to any design or picture which may be made according to Inyinvention, nor to any tint or tints which may be employed in carrying the same into effect; but

A transparent or translucent card or sign having an incomplete part of its lettering or design on the face A and the remaining part thereof on the back B, in such manner that when held up to the light the design or letter ing o n the back B will complete the design or lettering on the face A, and vice versa, substantially as specified.

WILLIAM H. OALDVVELL.

Witnesses:

WILLY G. E. SonUL'IZ, WILLIAM H. 0. SMITH. 

